Elastix 0.8.4-Beta2 problem!

First i cannot heare voice with two side. I call sip to
sip and only one of them can recive voice, so i change in bouth NAT=no and apply change.

So i again make call and sems its work.

And now i have again short question because when i apply change GUI print me "This DID is already associatedwith extension :101(test2)" and i see he don`t apply NAT change but i heare voice with both side, why ?.

Then i check

next i call from pstn to SIP and again i heare only one side. I don`t now why i heare voice only in handy. Softphone is queied.

So i make new sip extension, then edit again and change nat=no and change DID nummber. Then i apply and i see he realy apply my changes.

So i again make call from pstn and i still heare only one side.

BTW. For what is this alert ? "This DID is already associatedwith extension" ?

Also i have problem with reciving faxes from pstn in my virtual fax. It will work fine in 8.3 version.

When i change in zapata.conf switchtype=euroisdn (before it was national) and i reboot machines i can here voice in both side. I don`t now why in elastix 8.3 when i was set national i can make proper call from/to my pstn.

In this same time i send ticket to my PSTN provider (Because i cannot make international calls) so i think he make some change on his PBX.

BTW now i download latest 8.4 stable version so when i install them i check this settings again.

Unfortunately i still don`t here voice from my pc microfon to my handy,When i call thought PSTN E1 line. From my handy to PC headset i here voice properly. When i use only Soft phone all works fine.

And second think i cannot make international calls. I call many time to my PSTN provider and he says i must select somewhere this option "Numbering Type" or "nature number for channel B" to Unknown. I don`t now where i can set this option.
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New info.
I find this option in zapata.conf
pridialplan=unknown

------Fresh info

No i now how can i make calls. But when i add pridialplan=unknown to zapata.conf i here voice only one side.